US1302350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control for boiler feed-pumps.
Assignee: ROBIN S OILER
•
Filing: 1918-03-20
•
Granted: 1919-04-29
•
Expires: 1938-03-20
Abstract
No abstract record available.
Inventors
- 👤 Walter L Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:58
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/0038; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7407; Y10T137/7413; Y10T137/8158; Y10T137/8326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1922-04-28 | 1922-10-28 | 1923-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1926-04-28 | 1926-10-28 | 1927-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1930-04-28 | 1930-10-28 | 1931-04-29 | $7700.00 | Window Closed / Lapsed |